Dozens of artists have already sent in photos, including Spencer Black, an Asheville-based photographer who shot this gorgeous long exposure image (above) of Blue Ghost fireflies putting on a show in Brevard, North Carolina. Along with his entry, titled "Searching for Love," Black writes that these insects "are unique because they stay lit and only hover about a foot off the ground."

Some more amazing images that have already been entered into the nature category can be viewed below, with captions written by the respective photographers. To learn how to submit your own photos, be sure to read the contest rules and FAQ first!

"Two polar bear cubs full of adrenaline on iceflow in Svalbard. The mother was just trying to have a quiet stroll but the cubs were not having any of that. This was the male cub and he just was so entertaining to watch."

"On the coast of Tenerife in the Canary Islands, we have quite the selection of affectionate green turtles (Chelonia mydas). I find myself devoting much time to these curious creatures. . This turtle was coming fron the surface with the sun behind it, and the sunrays surrounding it gave it a special majesty. Tenerife (Canary Islands) Spain Canon 7D, Canon 8-15mm, Subal Housing, 2x Subtronic strobes. F22, Iso 200, 1/160"

"Ah, the Agave plant. Filled with amazing patterns and textures. This particular subject was a great find while visiting San Francisco. Using some fun techniques I was able to get the light just right and the dimensionality of the plant just popped! It is definitely fun to take a moment and get intimate with nature."

"In the Strezlecki desert of Australia a flock of galahs replenish on the only small water available at the base of this lonely tree. It’s a rare photo opportunity to get such a clear and symmetrical shot of these beautiful birds in flight in the middle of the desert."